/// <summary>
/// Starts an explicit encryption context.
/// </summary>
/// <param name="key">The key.</param>
/// <param name="encryptionAlgorithm">The encryption algorithm.</param>
/// <param name="command">The BSON command.</param>
/// <returns>A encryption context. </returns>
public CryptContext StartExplicitEncryptionContext(Guid key, EncryptionAlgorithm encryptionAlgorithm, byte[] command)
{
ContextSafeHandle handle = Library.mongocrypt_ctx_new(_handle);
byte[] keyBuffer = key.ToByteArray();
unsafe
{
fixed (byte* p = keyBuffer)
{
IntPtr ptr = (IntPtr)p;
using (PinnedBinary pinned = new PinnedBinary(ptr, (uint)keyBuffer.Length))
{
handle.Check(_status, Library.mongocrypt_ctx_setopt_key_id(handle, pinned.Handle));
}
}
}
handle.Check(_status, Library.mongocrypt_ctx_setopt_algorithm(handle, Helpers.EncryptionAlgorithmToString(encryptionAlgorithm), -1));
unsafe
{
fixed (byte* p = command)
{
IntPtr ptr = (IntPtr)p;
using (PinnedBinary pinned = new PinnedBinary(ptr, (uint)command.Length))
{
handle.Check(_status, Library.mongocrypt_ctx_explicit_encrypt_init(handle, pinned.Handle));
}
}
}
return new CryptContext(handle);
}
